Night Light of Portes-lès-Valence (Auvergne-Rhône-Alpes) from space (France) Src. Average luminocity for 10x10km area is 45.4063% and for 50x50km: 11.161%.
Square area 10x10 km:
 7.46%
 10.79%
 4.13%
 1.75%
 8.41%
 4.76%
 7.46%
 8.41%
 19.84%
 25.56%
 1.43%Square area 50x50 km:
 1.49%
 2.2%
 0.96%
 1.14%
 1.25%
 1.23%
 1.59%
 1.43%
 3.14%
 9.67%
 75.91%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
45° 22' 19" North, 4° 10' 15.7" East
44° 52' 33.1" North, 4° 52' 26.9" East
44° 22' 31.5" North, 5° 34' 38.2" East
Some cities around Portes-lès-Valence sort by population:
• Valence
		6.2 km =3.9 mi, 
26°
• Bourg-lès-Valence
		8.1 km =5 mi, 
11°
• Guilherand-Granges
		6.3 km =3.9 mi, 
359°
• Livron-sur-Drôme
		11.3 km =7 mi, 
193°
• Saint-Péray
		8.4 km =5.2 mi, 
344°
• Chabeuil
		11.3 km =7 mi, 
77°
• Loriol-sur-Drôme
		15 km =9.3 mi, 
197°
• La Voulte-sur-Rhône
		11.3 km =7 mi, 
221°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016